/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:45:29,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:45:29,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:45:29,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 07:45:29,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:45:29,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:45:29,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:45:29,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:45:29,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:45:29,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:45:29,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:45:29,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:45:29,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:45:29,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:45:29,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:45:29,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:45:29,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:45:29,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:45:29,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:45:29,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:45:29,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:45:29,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:45:29,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:45:29,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:45:29,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:45:29,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:45:29,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:45:29,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:45:29,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:45:29,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:45:29,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:45:29,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:45:29,130 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:45:29,130 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:45:29,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:45:29,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:45:29,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:45:29,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:45:29,421 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:45:29,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2021-04-16 07:45:29,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb3703471/eeb9d94e6afd4a5e9f9e434bb25ee201/FLAG6ca83839b [2021-04-16 07:45:29,909 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:45:29,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2021-04-16 07:45:29,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb3703471/eeb9d94e6afd4a5e9f9e434bb25ee201/FLAG6ca83839b [2021-04-16 07:45:29,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb3703471/eeb9d94e6afd4a5e9f9e434bb25ee201 [2021-04-16 07:45:29,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:45:29,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:45:29,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:45:29,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:45:29,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:45:29,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:45:29" (1/1) ... [2021-04-16 07:45:29,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c885bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:29, skipping insertion in model container [2021-04-16 07:45:29,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:45:29" (1/1) ... [2021-04-16 07:45:29,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:45:29,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:45:30,072 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2021-04-16 07:45:30,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:45:30,089 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:45:30,127 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2021-04-16 07:45:30,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:45:30,146 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:45:30,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30 WrapperNode [2021-04-16 07:45:30,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:45:30,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:45:30,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:45:30,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:45:30,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... [2021-04-16 07:45:30,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:45:30,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:45:30,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:45:30,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:45:30,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:45:30,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:45:30,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:45:30,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:45:30,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 07:45:30,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 07:45:30,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:45:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:45:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:45:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:45:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:45:30,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:45:30,454 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 07:45:30,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:45:30 BoogieIcfgContainer [2021-04-16 07:45:30,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:45:30,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:45:30,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:45:30,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:45:30,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:45:29" (1/3) ... [2021-04-16 07:45:30,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e96a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:45:30, skipping insertion in model container [2021-04-16 07:45:30,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:45:30" (2/3) ... [2021-04-16 07:45:30,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e96a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:45:30, skipping insertion in model container [2021-04-16 07:45:30,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:45:30" (3/3) ... [2021-04-16 07:45:30,459 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-04-16 07:45:30,463 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:45:30,465 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:45:30,476 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:45:30,488 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:45:30,489 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:45:30,489 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:45:30,489 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:45:30,489 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:45:30,489 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:45:30,489 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:45:30,489 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:45:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-04-16 07:45:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-16 07:45:30,504 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:30,504 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:30,505 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1039138334, now seen corresponding path program 1 times [2021-04-16 07:45:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:30,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78567135] [2021-04-16 07:45:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:30,551 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:45:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:45:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 07:45:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:45:30,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78567135] [2021-04-16 07:45:30,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:45:30,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 07:45:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826149622] [2021-04-16 07:45:30,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 07:45:30,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:45:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 07:45:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:45:30,722 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:45:30,809 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-04-16 07:45:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 07:45:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-04-16 07:45:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:45:30,818 INFO L225 Difference]: With dead ends: 50 [2021-04-16 07:45:30,818 INFO L226 Difference]: Without dead ends: 27 [2021-04-16 07:45:30,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:45:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-16 07:45:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-16 07:45:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:45:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-04-16 07:45:30,850 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2021-04-16 07:45:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:45:30,851 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-04-16 07:45:30,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-04-16 07:45:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-16 07:45:30,851 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:30,851 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:30,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:45:30,852 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:30,852 INFO L82 PathProgramCache]: Analyzing trace with hash 677978447, now seen corresponding path program 1 times [2021-04-16 07:45:30,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:30,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267461025] [2021-04-16 07:45:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:30,855 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:45:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:30,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:30,917 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-04-16 07:45:30,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:45:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 07:45:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:30,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:30,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:45:30,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267461025] [2021-04-16 07:45:30,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:45:30,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-16 07:45:30,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392207021] [2021-04-16 07:45:30,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-16 07:45:30,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:45:30,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-16 07:45:30,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-16 07:45:30,990 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:45:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:45:31,119 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-04-16 07:45:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-16 07:45:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-04-16 07:45:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:45:31,121 INFO L225 Difference]: With dead ends: 46 [2021-04-16 07:45:31,122 INFO L226 Difference]: Without dead ends: 31 [2021-04-16 07:45:31,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-16 07:45:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-04-16 07:45:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-04-16 07:45:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:45:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-04-16 07:45:31,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2021-04-16 07:45:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:45:31,141 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-04-16 07:45:31,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:45:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-04-16 07:45:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-16 07:45:31,143 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:31,143 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:31,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 07:45:31,143 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash -673447056, now seen corresponding path program 1 times [2021-04-16 07:45:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:31,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247308216] [2021-04-16 07:45:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:31,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:31,181 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_16 v_~SIZE~0_12) (<= v_~last~0_17 v_main_~c~0_16)) InVars {~SIZE~0=v_~SIZE~0_12, main_~c~0=v_main_~c~0_16, ~last~0=v_~last~0_17} OutVars{~SIZE~0=v_~SIZE~0_12, main_~c~0=v_main_~c~0_16, ~last~0=v_~last~0_17} AuxVars[] AssignedVars[] [2021-04-16 07:45:31,191 WARN L240 tifierPushTermWalker]: treesize reduction 18, result has 80.0 percent of original size [2021-04-16 07:45:31,196 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,205 INFO L725 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-04-16 07:45:31,209 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,211 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,217 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,219 INFO L108 tifierPushTermWalker]: treesize reduction 4, result has 20.0 percent of original size [2021-04-16 07:45:31,225 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,232 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,234 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-04-16 07:45:31,238 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,239 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-04-16 07:45:31,243 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,245 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,249 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,254 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,256 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,258 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,261 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,263 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,265 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,267 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,269 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,271 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,273 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,274 WARN L245 tifierPushTermWalker]: treesize reduction 18, result has 80.0 percent of original size 72 [2021-04-16 07:45:31,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-04-16 07:45:31,307 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:45:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 07:45:31,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:45:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 07:45:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:45:31,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 07:45:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-16 07:45:31,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-04-16 07:45:31,389 INFO L142 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-04-16 07:45:31,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247308216] [2021-04-16 07:45:31,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:45:31,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 07:45:31,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169393159] [2021-04-16 07:45:31,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 07:45:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:45:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 07:45:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-16 07:45:31,391 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:45:31,490 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2021-04-16 07:45:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 07:45:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-04-16 07:45:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:45:31,492 INFO L225 Difference]: With dead ends: 59 [2021-04-16 07:45:31,492 INFO L226 Difference]: Without dead ends: 43 [2021-04-16 07:45:31,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-16 07:45:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-04-16 07:45:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-04-16 07:45:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:45:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-04-16 07:45:31,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 24 [2021-04-16 07:45:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:45:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-04-16 07:45:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-04-16 07:45:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-16 07:45:31,501 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:31,501 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:31,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 07:45:31,502 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 708533296, now seen corresponding path program 1 times [2021-04-16 07:45:31,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:31,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262404764] [2021-04-16 07:45:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:31,505 INFO L142 QuantifierPusher]: treesize reduction 1, result has 92.9 percent of original size [2021-04-16 07:45:31,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:31,506 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_22 v_~last~0_21) (< v_main_~c~0_22 v_~SIZE~0_16)) InVars {~SIZE~0=v_~SIZE~0_16, main_~c~0=v_main_~c~0_22, ~last~0=v_~last~0_21} OutVars{~SIZE~0=v_~SIZE~0_16, main_~c~0=v_main_~c~0_22, ~last~0=v_~last~0_21} AuxVars[] AssignedVars[] [2021-04-16 07:45:31,509 WARN L240 tifierPushTermWalker]: treesize reduction 18, result has 78.6 percent of original size [2021-04-16 07:45:31,512 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,514 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,516 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,518 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,520 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,521 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,523 INFO L725 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-04-16 07:45:31,524 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,524 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,528 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,531 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,534 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,536 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,537 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-04-16 07:45:31,538 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,540 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,541 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-04-16 07:45:31,542 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,545 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,547 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,548 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,550 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,551 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,554 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,558 WARN L245 tifierPushTermWalker]: treesize reduction 18, result has 78.6 percent of original size 60 [2021-04-16 07:45:31,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-04-16 07:45:31,573 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:45:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:45:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 07:45:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:45:31,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-04-16 07:45:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,624 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:31,634 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.9 percent of original size [2021-04-16 07:45:31,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-16 07:45:31,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-04-16 07:45:31,654 INFO L142 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-04-16 07:45:31,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262404764] [2021-04-16 07:45:31,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:45:31,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 07:45:31,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343836196] [2021-04-16 07:45:31,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 07:45:31,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:45:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 07:45:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-16 07:45:31,659 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:45:31,755 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-04-16 07:45:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 07:45:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-04-16 07:45:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:45:31,756 INFO L225 Difference]: With dead ends: 64 [2021-04-16 07:45:31,756 INFO L226 Difference]: Without dead ends: 41 [2021-04-16 07:45:31,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-16 07:45:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-04-16 07:45:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-04-16 07:45:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:45:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-04-16 07:45:31,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 24 [2021-04-16 07:45:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:45:31,769 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-04-16 07:45:31,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-04-16 07:45:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-16 07:45:31,770 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:31,770 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:31,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-16 07:45:31,771 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2061972965, now seen corresponding path program 1 times [2021-04-16 07:45:31,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:31,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465922705] [2021-04-16 07:45:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:31,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:31,794 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_28 v_~SIZE~0_20) (<= v_~last~0_25 v_main_~c~0_28)) InVars {~SIZE~0=v_~SIZE~0_20, main_~c~0=v_main_~c~0_28, ~last~0=v_~last~0_25} OutVars{~SIZE~0=v_~SIZE~0_20, main_~c~0=v_main_~c~0_28, ~last~0=v_~last~0_25} AuxVars[] AssignedVars[] [2021-04-16 07:45:31,797 WARN L240 tifierPushTermWalker]: treesize reduction 18, result has 80.0 percent of original size [2021-04-16 07:45:31,800 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,802 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,805 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,807 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,809 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,812 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,813 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,814 INFO L725 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-04-16 07:45:31,815 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,816 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,821 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,823 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,826 INFO L108 tifierPushTermWalker]: treesize reduction 4, result has 20.0 percent of original size [2021-04-16 07:45:31,827 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,828 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-04-16 07:45:31,830 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-04-16 07:45:31,833 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,834 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,837 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,840 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:31,841 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,843 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,845 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,846 WARN L245 tifierPushTermWalker]: treesize reduction 18, result has 80.0 percent of original size 58 [2021-04-16 07:45:31,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-04-16 07:45:31,863 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:45:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,886 INFO L142 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-04-16 07:45:31,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,889 INFO L142 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size [2021-04-16 07:45:31,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-16 07:45:31,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:45:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 07:45:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:45:31,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:45:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:45:31,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,941 INFO L142 QuantifierPusher]: treesize reduction 37, result has 26.0 percent of original size [2021-04-16 07:45:31,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 07:45:31,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-04-16 07:45:31,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:45:31,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:45:31,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-04-16 07:45:31,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 07:45:31,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:31,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 07:45:31,994 INFO L142 QuantifierPusher]: treesize reduction 22, result has 4.3 percent of original size [2021-04-16 07:45:31,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:45:31,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465922705] [2021-04-16 07:45:31,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:45:31,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-04-16 07:45:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274418995] [2021-04-16 07:45:31,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-16 07:45:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:45:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-16 07:45:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-04-16 07:45:31,996 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:45:32,174 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-04-16 07:45:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 07:45:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-04-16 07:45:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:45:32,175 INFO L225 Difference]: With dead ends: 61 [2021-04-16 07:45:32,175 INFO L226 Difference]: Without dead ends: 39 [2021-04-16 07:45:32,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-04-16 07:45:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-04-16 07:45:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-04-16 07:45:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:45:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-04-16 07:45:32,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2021-04-16 07:45:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:45:32,181 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-04-16 07:45:32,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-04-16 07:45:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-04-16 07:45:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-16 07:45:32,181 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:45:32,181 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:45:32,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-16 07:45:32,182 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:45:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:45:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2067453981, now seen corresponding path program 1 times [2021-04-16 07:45:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:45:32,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396132844] [2021-04-16 07:45:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:45:32,185 INFO L142 QuantifierPusher]: treesize reduction 1, result has 92.9 percent of original size [2021-04-16 07:45:32,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:45:32,186 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_34 v_~last~0_29) (< v_main_~c~0_34 v_~SIZE~0_24)) InVars {~SIZE~0=v_~SIZE~0_24, main_~c~0=v_main_~c~0_34, ~last~0=v_~last~0_29} OutVars{~SIZE~0=v_~SIZE~0_24, main_~c~0=v_main_~c~0_34, ~last~0=v_~last~0_29} AuxVars[] AssignedVars[] [2021-04-16 07:45:32,187 WARN L240 tifierPushTermWalker]: treesize reduction 18, result has 78.6 percent of original size [2021-04-16 07:45:32,190 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,192 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,194 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,196 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,198 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,199 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,200 INFO L725 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-04-16 07:45:32,201 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,201 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,205 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,208 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:32,211 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,213 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:32,213 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-04-16 07:45:32,215 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,217 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,217 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-04-16 07:45:32,219 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:32,221 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,223 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,224 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,226 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,228 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,229 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:45:32,230 WARN L245 tifierPushTermWalker]: treesize reduction 18, result has 78.6 percent of original size 60 [2021-04-16 07:45:32,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:45:32,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-04-16 07:45:32,244 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:45:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:45:32,257 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:45:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:45:32,291 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:45:32,318 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-04-16 07:45:32,318 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 07:45:32,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-16 07:45:32,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:45:32 BoogieIcfgContainer [2021-04-16 07:45:32,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:45:32,358 INFO L168 Benchmark]: Toolchain (without parser) took 2425.46 ms. Allocated memory was 184.5 MB in the beginning and 222.3 MB in the end (delta: 37.7 MB). Free memory was 149.6 MB in the beginning and 87.8 MB in the end (delta: 61.8 MB). Peak memory consumption was 100.3 MB. Max. memory is 8.0 GB. [2021-04-16 07:45:32,358 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 184.5 MB. Free memory was 166.8 MB in the beginning and 166.7 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:45:32,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.16 ms. Allocated memory is still 184.5 MB. Free memory was 149.4 MB in the beginning and 168.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. [2021-04-16 07:45:32,358 INFO L168 Benchmark]: Boogie Preprocessor took 24.48 ms. Allocated memory is still 184.5 MB. Free memory was 168.3 MB in the beginning and 166.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 07:45:32,359 INFO L168 Benchmark]: RCFGBuilder took 281.24 ms. Allocated memory is still 184.5 MB. Free memory was 166.8 MB in the beginning and 150.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-04-16 07:45:32,359 INFO L168 Benchmark]: TraceAbstraction took 1901.22 ms. Allocated memory was 184.5 MB in the beginning and 222.3 MB in the end (delta: 37.7 MB). Free memory was 149.5 MB in the beginning and 87.8 MB in the end (delta: 61.6 MB). Peak memory consumption was 98.8 MB. Max. memory is 8.0 GB. [2021-04-16 07:45:32,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 184.5 MB. Free memory was 166.8 MB in the beginning and 166.7 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 204.16 ms. Allocated memory is still 184.5 MB. Free memory was 149.4 MB in the beginning and 168.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.48 ms. Allocated memory is still 184.5 MB. Free memory was 168.3 MB in the beginning and 166.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.24 ms. Allocated memory is still 184.5 MB. Free memory was 166.8 MB in the beginning and 150.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1901.22 ms. Allocated memory was 184.5 MB in the beginning and 222.3 MB in the end (delta: 37.7 MB). Free memory was 149.5 MB in the beginning and 87.8 MB in the end (delta: 61.6 MB). Peak memory consumption was 98.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L9] int last ; [L18] int SIZE = 200000; [L22] last = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(last > 0) [L6] COND FALSE !(!cond) [L23] RET assume_abort_if_not(last > 0) [L24] int a=0,b=0,c=0,st=0,d=0; [L25] COND TRUE 1 [L26] st=1 [L27] c=0 [L27] COND TRUE c=last) [L27] c++ [L27] COND FALSE !(c